21663204233362 has 8 divisors (see below), whose sum is σ = 32571991164492. Its totient is φ = 10805873845200.

The previous prime is 21663204233347. The next prime is 21663204233389. The reversal of 21663204233362 is 26333240236612.

It can be written as a sum of positive squares in 2 ways, for example, as 21614865374041 + 48338859321 = 4649179^2 + 219861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12864134689 + ... + 12864136372.

Almost surely, 2^{21663204233362} is an apocalyptic number.

21663204233362 is a deficient number, since it is larger than the sum of its proper divisors (10908786931130).

21663204233362 is a wasteful number, since it uses less digits than its factorization.

21663204233362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25728271484.

The product of its (nonzero) digits is 1119744, while the sum is 43.

Adding to 21663204233362 its reverse (26333240236612), we get a palindrome (47996444469974).

The spelling of 21663204233362 in words is "twenty-one trillion, six hundred sixty-three billion, two hundred four million, two hundred thirty-three thousand, three hundred sixty-two".